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<!doctype html>
<!--
Any copyright is dedicated to the Public Domain.
-->
<title>Examples of rule longitudinal properties</title>
<style>
html,body {
color:black; background-color:white; font:20px/1 monospace;
}
@keyframes lat {
0%, 33% { column-rule-lateral-inset-start: 0px; row-rule-lateral-inset-end: 0px; }
33%, 50% { column-rule-lateral-inset-start: calc(100% - 6px); row-rule-lateral-inset-end: calc(100% - 6px); }
50%, 100% { column-rule-lateral-inset-start: 0px; row-rule-lateral-inset-end: 0; }
}
.grid {
display: inline-grid;
grid-template-columns: repeat(3, 50px);
gap: 10px;
width: 250px;
height: 200px;
place-content: space-around;
animation: lat 5s infinite;
column-rule: 6px solid blue;
column-rule-align: rule;
column-rule-longitudinal-inset: 3px;
column-rule-edge-align: gap-over;
column-rule-longitudinal-edge-inset: 10px;
row-rule: 6px solid purple;
row-rule-align: rule;
row-rule-edge-align: gap-over;
row-rule-longitudinal-inset: 1px;
row-rule-longitudinal-edge-inset: -2px;
row-rule-extent: long;
border: 2px solid;
margin-right: 15px;
margin-bottom: 30px;
background: lightgrey;
}
x {
block-size: 48px;
background: grey;
}
x:nth-child(2), x:nth-child(6) {
grid-column: span 2;
}
</style>
<div class="grid"><x>1</x><x>2</x><x>3</x><x>4</x><x>5</x><x>6</x><x>7</x></div>